Texas Instruments DEM-PCM2912A EVM - Manuals

1.2 Pin Assignments and Terminal Functions PCM2912APJT (32-pin TQFP) 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 32 10 31 11 30 12 29 13 28 14 27 15 26 16 25 PGND V IN V CCP V CCA TEST1 NC TEST0 AGND SSPND V COM2 MMUTE V COM1 REC FR PLAY FL BGND V BU S D - D+ V D D DGND XTO XTI POWER MAMP V R O U T V ...

1.3 Functional Block Diagram S S XTI XTO 6.000 MHz 96 MHz PLL (x16) Tracker (SpAct ) â USB protocol controller ISO-out endpoint Control endpoint ISO-in endpoint FIFO FIFO XCVR Selector Selector Analog PLL Analog PLL USB SIE V REF 5 V to 3.3 V Voltage Regulator Power Manager ADC DAC MIC Bias MIC Amp ...

Chapter 2 SBAU141 – January 2009 Getting Started This chapter provides information regarding handling and unpacking the DEM-PCM2912A EVM, as wellas the EVM absolute operating conditions and a description of the factory default switch and jumperconfigurations. Topic .....................................

2.1 Electrostatic Discharge Warning 2.2 Block Diagram PC USB Connector D2 D1 SW1 JP1 J1 JP2 J2 PCM2912A PCM2912A-EVM Mic Headphone CN1 D+, D - PLAYREC V IN V L/R OUT POWER MMUTE MAMP 2.3 Interface and Connections Electrostatic Discharge Warning www.ti.com Many of the components on the DEM-PCM2912A E...

Chapter 3 SBAU141 – January 2009 Set-Up Guide This chapter discusses how to set up the DEM-PCM2912A EVM on personal computers (PCs) equippedwith any of a variety of major operating systems, including Microsoft Windows Vista ® , Windows XP ® , and Macintosh ® OS X and later. Topic ......................

3.1 Basic Operating Set-Up—Windows Vista 3.1.1 Basic Setup Before Evaluation Basic Operating Set-Up—Windows Vista www.ti.com This section reviews how to set up the DEM-PCM2912A EVM for use with a PC equipped with theMicrosoft Vista Basic (or higher) operating system. When the installation is complet...

3.1.2 Volume and Mute Settings www.ti.com Basic Operating Set-Up—Windows Vista Follow these steps to configure the volume settings for headphones, microphone, and the recordingoptions. To set the headphone volume: Step 1. Open the Sound options from the Control Panel. ( Start → Control Panel → Sound...

Basic Operating Set-Up—Windows Vista www.ti.com To set the record volume: Step 1. Open the Sound options from the Control Panel. ( Start → Control Panel → Sound ) Step 2. Open the microphone properties of the USB audio codec from the Sound options and selectthe Levels tab, as Figure 3-4 illustrates....

3.1.3 Sampling Frequency www.ti.com Basic Operating Set-Up—Windows Vista Under the Windows Vista operating system, it is necessary to select a specific sampling frequencybecause the sampling frequency cannot be changed on nearly all application software. To set the DAC sampling frequency: 1. Open th...

Basic Operating Set-Up—Windows Vista www.ti.com To set the ADC sampling frequency: 1. Open the Sound options from the Control Panel. ( Start → Control Panel → Sound ) 2. Open the microphone properties of the USB audio codec from the Sound options and select the Advanced tab, as Figure 3-6 illustrate...

3.2 Basic Operating Set-Up—Windows XP 3.2.1 Basic Setup Before Evaluation www.ti.com Basic Operating Set-Up—Windows XP This section reviews how to set up the DEM-PCM2912A EVM for use with a PC equipped with theMicrosoft XP (including Service Pack 2 updates) operating system. When the installation is...

www.ti.com Basic Operating Set-Up—Windows XP To set the microphone sidetone: 1. Open the Speakers options from the Volume selection box (on the Audio tab) or the Advanced selection box (on the Volume tab); see Figure 3-8 . Alternatively, double-click the speaker icon (if displayed) in the lower righ...

Basic Operating Set-Up—Windows XP www.ti.com space 3. Set the microphone volume and the recording mute level from –12 dB to +30 dB, as shown in Figure 3-11 . The initial volume setting upon installation is approximately +8 dB. Figure 3-11. Microphone Volume Windows for Record Volume Setting (Windows...

3.3 Basic Operating Set-Up—Mac OS 3.3.1 Basic Setup Before Evaluation www.ti.com Basic Operating Set-Up—Mac OS This section reviews how to set up the DEM-PCM2912A EVM for use with a Macintosh computerequipped with the Mac OS X (or later) operating system. When the installation is complete, the EVM s...

3.3.3 Sampling Frequency Basic Operating Set-Up—Mac OS www.ti.com To set the microphone sidetone: The volume setting of the microphone sidetone is controlled by the individual application software onthe Mac. For example, Audio Recording using QuickTime ® (as shown in Figure 3-15 ) sets the microphon...

Chapter 4 SBAU141 – January 2009 Evaluation and Measurements This chapter discusses how to set up the DEM-PCM2912A EVM for performance evaluation using theAudio Precision SYS-2722 ® audio analyzer. The process of measuring dynamic characteristics is then presented, along with example characteristic ...

4.1 Measurements for Dynamic Characteristics 4.2 Playback Performance PC Playing test data at f = 44.1 kHz by application software(for example, Sound Recorder, Media Player, etc.) S USBConnector D2 D1 SW1 JP1 J1 JP2 J2 100 mA 0 dB PCM2912A PCM2912A-EVM Mic Headphone Audio Precision SYS-2722 Analog A...

www.ti.com Playback Performance Table 4-1. Line Output Playback Performance Power Supply Performance Filter Setting R L V OUT L V OUT R 5.0 V THD+N (0 dBFS at 400 Hz to 20 kHz 10 k Ω 0.0086% 0.0085% 1 kHz) Pre-Anlr SNR (BPZ input) 400 Hz to 20 kHz 10 k Ω 92.1 dB 92.1 dB Pre-Anlr+ A-weighting DR (–60...

4.3 Recording Performance PC Recording at f = 44.1 kHz by application software(for example, Sound Recorder, QuickTime, etc.) S USBConnector D2 D1 SW1 JP1 J1 JP2 J2 100 mA 0 dB PCM2912A PCM2912A-EVM Mic Headphone Audio Precision SYS-2722 Analog Generator UnbalancedFloating GND setting Audio Precision...

Chapter 5 SBAU141 – January 2009 Schematic, PCB Layout, and Bill of Materials This chapter provides the electrical and physical layout information for the DEM-PCM2912A EVM. The billof materials is included for component and manufacturer reference. Note: Board layouts are not to scale. These are inte...

5.1 Schematics Schematics www.ti.com The schematic for the DEM-PCM2912A EVM is shown in Figure 5-1 . Figure 5-1. DEM-PCM2912A EVM Schematic Schematic, PCB Layout, and Bill of Materials 38 SBAU141 – January 2009 Submit Documentation Feedback

5.2 Printed Circuit Board Layout www.ti.com Printed Circuit Board Layout Figure 5-2 through Figure 5-4 illustrate the printed circuit board (PCB) layout for the DEM-PCM2912A EVM. Figure 5-2. DEM-PCM2912A EVM Board Layout—Silkscreen Figure 5-3. DEM-PCM2912A EVM Board Layout—Component Side Figure 5-4....

5.3 Component List Component List www.ti.com Table 5-1 lists the bill of materials for the DEM-PCM2912A EVM. Table 5-1. Bill of Materials Reference Designator Value Value2 Manufacturer Mfr Part No Remarks C1 22 pF 50 V, 5% Taiyoyuden UMK107CH220JZ C2 22 pF 50 V, 5% Taiyoyuden UMK107CH220JZ C4 100 pF...

EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product...

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